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Stylus Rake Angle

I am trying to set up my new VPI 3D arm as close to perfection as I can. On the Analog Planet, Michael Fremer gives one opinion, however, a different opinion was voiced by Harry at VPI, and Peter at Soundmith. I've been discussing this with them....Fremer says that SRA should be adjusted even if the back end of the arm is WAY high up as needed, whereas Harry, and Peter said to start with the arm in a horizontal position and move it slightly up and down to find the sweet spot. Peter said that my cartridge (Benz LPS) and some others have an additional facet in the diamond so bringing the arm up in back would be exaggerating the proper SRA. When I wrote back to Fremer, he answered with an insistance that he was correct. Does anyone want to add to the confusion??
128x128stringreen

Showing 2 responses by wntrmute2

wntrmute2's avatar
wntrmute2
188 posts
 
I have been chasing this 92 degree thing off and on for a year or so with fair results. Basically, when I've checked the two carts I've had for SRA after setting them by ear the results are not far off that 92 number. BUT, when one of the premier cartridge manufacturers says there is probably not much validity to this concept, I think I may relegate my USB microscope to the closet.
http://i3.photobucket.com/albums/y57/WntrMute2/9fcaa181cb084a96e99991e54887c11e_zps43ed330b.jpg
http://i3.photobucket.com/albums/y57/WntrMute2/ScreenShot2012-10-12at91619AM_zpsf582ed48.png
wntrmute2's avatar
wntrmute2
188 posts
 
I don't get this "slur" thing. The stylus is rigid/ inflexible and so whether the tip or farther up encounters the groove wall first, a deflection occurs. I'm not saying none of this makes a difference but if a guy who cuts lacquers for a living and a guy who builds some of the most coveted carts in the world says move along, there is nothing to see here, then maybe we should believe them.
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